# Student Projects/Multiplication- STAR Technique

This technique is simple combination of multiplication and addition simultaneously which we do separately in normal method. Use this method we should be very quick and precise with multiplication tables.

**Suppose we need to multiply 27 with 83**

** Step 1:** Write in this format

**2 7**

__8 3__

** Step 2: ** Now multiply digits in the ones place

*7x3=21*

*Write ‘1’ in ones of product and carry over ‘2’ to next step.*

**2 7**

__8 3__

** 1**

**Step 3 :** Now cross multiply digits in one place and tens place and add the result to the carry over digit

*2x3=6*

*8x7=56*

*6+56+2=64*

*Write ‘4’ in tens of product and carry over ‘6’ to next step.*

**2 7**

__8 3__

**4 1**

**Step 4: ** Now multiply digits in the tens place and add the result to the carry over digit

*2x8=16*

*16+6=22*

*Since each digit is multiplied with every other digit we can write ‘22’ directly without any carry over.*

**2 7**

__8 3__

**2 2 4 1**

One advantage of this method is we can finish this calculation in one line and if we are interrupted in between calculation, we can resume back looking at the number of digits we have written in the product.