lion can live 40 years, an elephant can live twice as long as a lion, and a turtle can live 20 years longer than twice as long as an elephant. How long can a sea turtle live.
狮子可以活40年，大象活的年数是狮子的2倍，海龟活的年数比大象的年数的2倍还多20年．海龟能活多少年．
<gadget id="calculator">40 * 2 * 2</gadget>
<output>160</output>

<gadget id="calculator">160 + 20</gadget>
<output>180</output>

<result>180</result>