* and /
On the top row, press / with your middle finger and * with your ring finger. Multiplication and division.
Rest your right hand on 4 5 6 of the numeric keypad and press Enter to start. Press Enter after each number
12*3 250*4 1000/4 980*1.1 3000/12 45*20 1200*0.08 360/6 15*15 7500/3 2400*1.1 100/8 64/8*3 500*12/100