A basket of apples weighs 20 kilograms, and a basket of pears weighs 10 kilograms less than three times the mass of a basket of apples. How many kilograms does a basket of pears weigh?
一筐苹果20千克，一筐梨的质量比一筐苹果的3倍少10千克．一筐梨重多少千克？
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">60 - 10</gadget>
<output>50</output>

<result>50</result>