The supermarket shipped 29 boxes of apples and pears each. Apples are 30kg per box and pears are 25kg per box. How many kilograms less pears are shipped in than apples in supermarkets?
超市运进苹果和梨各29箱．苹果每箱30千克，梨每箱25千克．超市运进的梨比苹果少多少千克？
<gadget id="calculator">29 * 30</gadget>
<output>870</output>

<gadget id="calculator">29 * 25</gadget>
<output>725</output>

<gadget id="calculator">870 - 725</gadget>
<output>145</output>

<result>145</result>