Alright, let's work through 71231672 times 42672742 step by step
71231672 × 42672742 = 42672742 × (71231672)
+ 42672742 × 2 what gives us 85345484
+ 42672742 × 70 what gives us 2987091940
+ 42672742 × 600 what gives us 25603645200
+ 42672742 × 1000 that results in 42672742000
+ 42672742 × 30000 resulting in 1280182260000
+ 42672742 × 200000 producing 8534548400000
+ 42672742 × 1000000 resulting in 42672742000000
+ 42672742 × 70000000 which equals 2987091940000000

= 3039650761484624
