There is a batch of rice that eats 15 kilograms a day, and 42 kilograms remain after eating for 8 days. How many kilograms of rice are there?
有一批大米，每天吃15千克，吃8天后还剩42千克，原来有多少千克大米？
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">120 + 42</gadget>
<output>162</output>

<result>162</result>