The fruit shop has apples, pears and bananas. The weight of an apple is 3/4 that of a pear, and the weight ratio of pears to bananas is 5:4. It is known that the total weight of pears and bananas is 180 kilograms. How many kilograms does an apple weigh?
水果店有苹果、梨和香蕉．苹果的重量是梨的(3/4)，梨与香蕉的重量比是5：4，已知梨和香蕉一共的重量是180千克，问苹果有多少千克？
<gadget id="calculator">20 + 16</gadget>
<output>36</output>

<gadget id="calculator">180 / 36</gadget>
<output>5</output>

<gadget id="calculator">5 * 15</gadget>
<output>75</output>

<result>75</result>