A total of 90 baskets of apples and pears are shipped from the supermarket, and the number of baskets of apples is 80% of that of pears. How many baskets of pears are there?
超市运来苹果和梨共90筐，苹果的筐数是梨的80%．运来梨多少筐？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">90 / (9/5)</gadget>
<output>50</output>

<result>50</result>