There are 20 baskets of pears, 3/5 of apples, and 4/5 of oranges. How many baskets of oranges are there?
商店买回一批水果，梨有20筐，苹果的筐数是梨的(3/5)，是橘子的(4/5)，橘子有多少筐？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(3/5) / (4/5)</gadget>
<output>3/4 = around 0.75</output>

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

<result>15</result>