How many inches are in $3 \tfrac{1}{4}$ yards?
I know that one yard is 36 inches, so I can use that to convert yards to inches. I can write $3 \tfrac{1}{4}$ yards as a fraction, $\tfrac{13}{4}$ yards, and then multiply by 36 inches per yard. This gives me $\tfrac{13}{4} \times 36 = \tfrac{13 \times 36}{4} = \tfrac{468}{4} = 117$ inches. Therefore, there are 117 inches in $3 \tfrac{1}{4}$ yards. 