Some fruits are shipped from the store. The number of baskets of pears is 3/4 of the number of baskets of apples. 15 baskets of pears are shipped. How many baskets of apples are shipped?
商店运来一些水果，梨的筐数是苹果筐数的(3/4)，运来梨15筐，运来苹果多少筐？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">15 / (3/4)</gadget>
<output>20</output>

<result>20</result>