“draw a straight line perpendicular to the first...”
step 3 :
“draw an arc measuring radius 2 across the first line, centred at the point where the first and second lines cross...”
step 4 :
“draw an arc measuring radius 1 across the first line, centred at the point where the first arc crossed the first line...”
step 5 :
“draw an arc measuring radius 1 across the second line, centred at the point where the first and second lines cross...”
step 6 :
“draw a straight line parallel to the first line, passing through the point made by the third arc across the second line...”
step 7 :
“draw an arc measuring radius 1 across the third line, centred at the point made by the third arc across the second line, in a direction opposite to the first arc relative to the second line...”
step 8 :
“join the two points, where the fourth arc crosses the third line, and where the second arc crosses the first line, with a straight line...”
step 9 :
“finally, measure the distance from the point where the third line crosses the second line, to the point where the fourth line crosses the second line...”
question : “what is 22 ÷ 7?”
answer :
step 1 :
“draw a straight line 7 notches long ...”
step 2 :
“draw a straight line 22 notches long from the start of and perpendicular to the first line...”
step 3 :
“draw a straight line 1 notch long from the end of and perpendicular to the second line, in a direction opposite to the first line...”
step 4 :
“join the end of the third line with notch 6 on the first line...”
step 5 :
“finally, measure the distance from the point where the third line touches the second line, to the point where the fourth line crosses the second line...”