No problem, we've got 7820 and 7863 to multiply
7820 × 7863 = 7863 × (7820)
+ 7863 × 0 that results in 0
+ 7863 × 20 that equals 157260
+ 7863 × 800 resulting in 6290400
+ 7863 × 7000 which equals 55041000

= 61488660
