A grass carp can grow to 35 kg, and a herring can grow to twice the size of grass carp. How many kilograms can a herring grow to?
一条草鱼能长到35千克，一条青鱼能长到草鱼的2倍．一条青鱼能长到多少千克？
<gadget id="calculator">35 * 2</gadget>
<output>70</output>

<result>70</result>