A grain processing factory processed 210 tons of grain in the first quarter of this year. According to this calculation, how many tons of grain can be processed this year?
某粮食加工厂，今年第一季度加工粮食210吨．照这样计算，今年全年能加工粮食多少吨？
<gadget id="calculator">210 * 4</gadget>
<output>840</output>

<result>840</result>