A certain granary originally contained 500 kg of rice, but after transporting 150 kg, another 200 kg was shipped in. How many kg of rice are there in the granary now?
某粮仓原有500千克大米，运走150千克后，又运来200千克，粮仓现在有多少千克大米？
<gadget id="calculator">500 - 150</gadget>
<output>350</output>

<gadget id="calculator">350 + 200</gadget>
<output>550</output>

<result>550</result>