There are 126 kilograms of peaches in the supermarket, which is twice the weight of pears. The weight of watermelon is three times that of pear, how many kilograms of watermelon are there in the supermarket?
超市里有桃子126千克，是梨子重量的2倍．而西瓜重量是梨子的3倍，超市里有西瓜多少千克？
<gadget id="calculator">126 / 2</gadget>
<output>63</output>

<gadget id="calculator">63 * 3</gadget>
<output>189</output>

<result>189</result>