Use the Trachtenberg speed system to multiply 715624 by 11


 * 1) Write out the calculation to be performed as \( \underline{0715624} \times 11\), with a leading zero placed in front of the number to be multiplied by 11.
 * 2) Note that the 4 on the right has no neighbouring digit to its right.
 * 3) Therefore, with the previous step in mind, add nothing to the 4 and write 4 as the rightmost digit of the answer like this: \[ {0715624\over \qquad \qquad \: 4}\]
 * 4) With the first pair of digits, perform the addition \(2+4=6\) and write 6 as the next digit of the answer like this: \[ {0715624\over \qquad \; \; \: \: \: \: \: \: \: 64}\]
 * 5) With the next pair of digits, perform the addition \(6+2=8\) and write 8 as the next digit of the answer like this: \[ {0715624\over \qquad \; \, \: \: \: 864}\]
 * 6) With the next pair of digits, perform the addition \(5+6=11\).
 * 7) Write 1 as the next digit of the answer like this: \[ {0715624\over \qquad \: 1864}\]
 * 8) Carry over a 1 for the next column by placing a single dot up high in front of the 1 that you just placed, like this: \[ {0715624\over \: \: \: \: \: \: \: \: \: \: \: \, ^{^{.}}1864}\]
 * 9) With the next pair of digits, perform the addition \(1+5=6\).
 * 10) Add on the 1 that was carried over to this 6 to get 7.
 * 11) Write 7 as the next digit of the answer like this: \[ {0715624\over \:\:\:\:\:\, 7^{^{.}}1864}\]
 * 12) With the next pair of digits, perform the addition \(7+1=8\) and write 8 as the next digit of the answer like this: \[ {0715624\over \:\, 87^{^{.}}1864}\]
 * 13) With the last pair of digits, perform the addition \(0+7=7\) and write 7 as the leftmost digit of the answer like this: \[ { \, \: \: \: \: 0715624\over 787^{^{.}}1864}\]
 * 14) Write the final answer as \(7871864\).

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