2 35

17 1

The underlined position: there is a vertical line between 2 and 35, and a horizontal line between 35 and 17.

Algorithm: Write the divisor 2 to the left of the dividend 35, divide by 2 first, the quotient is 1, write the quotient 1 below 3, and the remainder is 1 (remember it in your mind). The remainder 1 and the following number 5 form 15, and the quotient of 15 divided by 2 is 7 and written as 5.