I think it started as 1.32 x 42, which they tried to solve as 2 x 1.32 (2.64) + 40 x 1.32 (they started correctly with .80 + …, but I can’t figure out how they mangled the second half). Anyway, 2.64 + .80 carries 1, which is the small 1 to the left of the 42.