Method for multiplying numbers where the first figures add up 10 and the last figures are same

Method for multiplying numbers where t he first figures add up 10 and the last figures are same

44X64

Here first figures are 4 and 6 and their add up 10 and unit figures of both number are same Just multiplying the last figures 4x4=16 Put it at right hand side

Now we get required answer2816Similarly 36x76 , 6X6 =36 right hand side , (3x7)+6= 21+6=27 left hand side Required answer is 2736NOTE If multiplication of last figures is less than 10 add zero before unit digitEx 81x21 , 1x1=01,( 8x2)+1= 16+1=17 Required answer 1701