The fruit shop brings in 5 boxes of pears, each box contains 9 kilograms, and each kilogram can be sold for 4 yuan. How much can these pears be sold for in total?
水果店运进5箱梨，每箱装9千克，每千克可以卖4元钱，这些梨一共可以卖多少钱？
<gadget id="calculator">9 * 5 * 4</gadget>
<output>180</output>

<result>180</result>