No problem, we've got 1161 and 1378 to multiply
1161 × 1378 = 1378 × (1161)
+ 1378 × 1 that results in 1378
+ 1378 × 60 what gives us 82680
+ 1378 × 100 that results in 137800
+ 1378 × 1000 resulting in 1378000

= 1599858
