Multiply by formula Urdhva Tiryagbhyam -

486 x 26

Method:

First of all group formation is done with the digits given in the question. If in any number few digits are less then employing the same number of zeros before that equalize the digit number of both the numbers. Group formation is done with these columns.

Group Number = Column Number x 2 – 1 = odd number

In last the GroupWise products are added by writing them serially by a specific method. This gives the required product.

0/8/40/60/36

= 12636