Alright, let's work through 1891 times 1948 step by step
1891 × 1948 = 1948 × (1891)
+ 1948 × 1 that is equal 1948
+ 1948 × 90 giving us 175320
+ 1948 × 800 that results in 1558400
+ 1948 × 1000 resulting in 1948000

= 3683668
