Question 1140645
<pre>
He misread the problem. The multiplier has ONE LESS digit than the multiplicand.
So he should have

66*3 = 198    2 digits times 1 digit --> 0 7
666*33 = 21978    3 digits times 2 digits --> 1 7
6666*333 = 2219778    4 digits times 3 digits --> 2 7's
66666*3333 = 222197778    5 digits times 4 digits --> 3 7's
666666*33333 = 22221977778    6 digits times 5 digits --> 4 7's

So if the pattern continues, then it should be

86 digits times 85 digits --> 84 7's

Edwin</pre>