The teacher prepared prizes for the students, and bought 5 boxes of pens, each with 6 pens, and each pen cost 5 yuan. How much did the teacher spend in total?
老师为同学们准备奖品，买来5盒钢笔，每盒有6枝，每枝5元钱．老师一共花了多少元钱？
<gadget id="calculator">5 * 6 * 5</gadget>
<output>150</output>

<result>150</result>