There are 150 kilograms of pears in the fruit shop. The weight of peaches is 3/5 of that of pears and 2/7 of that of apples. How many kilograms does an apple weigh?
水果店有150千克梨，桃的重量是梨的(3/5)，又是苹果的(2/7)．苹果有多少千克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/5) / (2/7)</gadget>
<output>21/10 = around 2.1</output>

<gadget id="calculator">150 * (21/10)</gadget>
<output>315</output>

<result>315</result>