Alright, let's work through 6488495 times 31138354 step by step
6488495 × 31138354 = 31138354 × (6488495)
+ 31138354 × 5 what gives us 155691770
+ 31138354 × 90 producing 2802451860
+ 31138354 × 400 which equals 12455341600
+ 31138354 × 8000 resulting in 249106832000
+ 31138354 × 80000 what gives us 2491068320000
+ 31138354 × 400000 resulting in 12455341600000
+ 31138354 × 6000000 producing 186830124000000

= 202041054237230
