Answer
$9,951$
Work Step by Step
Since $93=100-7$ and $107=100+7$, then
$93 \times 107 = (100-7)(100+7)$.
Use the formula $(a-b)(a+b)=a^2-b^2$ with $a=20$ and $b=2$ to obtain:
$=100^2-7^2
\\=10,000-49
\\=9,951$
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