Multiply by the formula Ekadhikena Purvena -

413 x 487

Method:

There are two sides of a product.

Left Hand Side = Multiplicand – 1

Right Hand Side = Multiplier – Left Hand Side

So, Multiplicand × Multiplier = Multiplicand – 1/ Multiplier – Left Hand Side

=4×(4+1)/13×87

=20/1131

=201131

Ans: 201131