Tags for position of digits for place values

Description, operations and result

Ten-thousands

Thousands

Hundreds

Tens

Units

Multiplicand

a3

a2

a1

Multiplier

b3

b2

b1

First operation

b1a3

b1a2

b1a1

Second operation

b2a3

b2a2

b2a1

X

Third operation

b3a2

b3a2

b3a1

X

Result of product

b3a2

b2a3 + b3a2

b1a3 + b2a2 + b3a1

b1a2 + b2a1

b1a1