Multiply by the formula EkanyunenaPurvena -

342 x 99999

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

342 - 1 = 341

99999 - 341 = 99658

Ans: 34199658