Uncle Li planted 30 radishes. In order to estimate the yield, he took two radishes and weighed them to 10 kg. According to this, how many kilograms of radishes can Uncle Li collect?
李叔叔种了30畦萝卜，为了估计一下产量，他先收下两畦称了称重10千克．照这样李叔叔大约可收萝卜多少千克？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 30</gadget>
<output>150</output>

<result>150</result>