One bag of rice weighs 50 kg, and the other bag weighs 10 kg less. How much does the two bags of rice weigh in total?
一袋大米是50千克，另一袋比它少10千克，两袋米共重多少千克？
<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">50 + 40</gadget>
<output>90</output>

<result>90</result>