A shark has a head length of 70 centimeters, a tail length that is half the length of the head length, and a body length equal to 3 head lengths. You are smart enough to figure out how long this big shark is?
一条鲨鱼，鱼头长70厘米，鱼尾长是鱼头长的一半，鱼身长等于3个鱼头长，聪明的你来算算这条大鲨鱼有多长？
<gadget id="calculator">70 / 2</gadget>
<output>35</output>

<gadget id="calculator">70 * 3</gadget>
<output>210</output>

<gadget id="calculator">70 + 35 + 210</gadget>
<output>315</output>

<result>315</result>