^{9}possible solutions to the problem of reconstrucing the following exact long division in which the digits were indiscriminately replaced by X save in the quotient where they were almost entirely omitted:

Deflate the Professor! That is, reduce the possibilities to (81x10

^{9})

^{0}.

Because any number raised to the power of zero is one, the reader's task is to discover the unique reconstruction of the problem. The 8 is in the correct position above the line, making it the third digit of a five-digit answer. The problem is easier than it looks, yielding readily to a few elementary insights.