Question

Explain how the bowtie method is used to multiply two digit numbers.

Answer 1

    34
x  45
--------

4*5=20 (Drop the 0 and carry the 2)
(4*4) + (3*5) + 2 = 33 (Drop the 3 and carry the 3)
3*4 + 3 = 15 (Write 15 )

    34
x  45
--------
1530

Also, it is called Urdhva Tiryagbhyam. (official name)