How many inches in 5 feet 7 inches? How many cups in 2 gallons, meters in 3.2 kilometers, feet per second in 60 miles an hour? Find the fact that links the units, decide whether to multiply or divide, and watch the units cancel — with the metric staircase, the gallon kingdom and a thermometer to show why. Ratios and unit rates are on the Ratio Table, clock times on the Place Value Chart.