Given:
1/2 pound of cheese
3 sandwiches
To need to divide the 1/2 pound of cheese by 3 sandwiches to get the equal amount of cheese each sandwich must have.
1/2 ÷ 3 = 1/2 * 1/3 = 1/6 pound per cheese
Each sandwich contains 1/6 pound of cheese from the 1/2 pound of cheese available.