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Question

Multiply:
3116×3156

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Solution

3116×3156

Lets write these mixed fractions as addition i.e.

3116=31+16

Similarly,

3156=31+56

now we have

=(31+16)×(31+56)

=31(31+56)+16(31+56)

=31×31+31×56+31×16+16×56

=961+31(16+56)+536

=961+31×66+536

=961+31×1+536

=961+31+536

=992+536

=992536

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