An elephant eats 0.15 tons of grass every day. There are 10 elephants in the zoo. How many tons of grass can they eat in February 2012?
1只大象每天吃青草0.15吨，动物园里有10只大象，2012年2月份能吃掉多少吨青草．
<gadget id="calculator">0.15 * 10 * 29</gadget>
<output>43.5</output>

<result>43.5</result>