A4 paper is 29.7 cm long, and only seven circles with a diameter of 4 cm can be arranged in the length, and only five circles with a diameter of 4 cm can be arranged in the width of 2 1 cm. At this rate, only 35 laps can be lined up.

If 7 circles are evenly arranged in a single row (long row) (center distance is 4.2 cm), and 6 circles are arranged in two rows, 6 * * * can be arranged in one row (3 rows in a single row and 3 rows in a double row) * * can be arranged in (7+6)×3=39 circles.

A: You can cut up to 39 small pieces of paper with a diameter of 4 cm. I draw them on A4 paper with compasses. it wont hurt you to try it Good luck, goodbye.