A factory used 40 tons of water in March, used 3/8 of the water used in April, and used 1/3 of the water used in April, how many kilograms of water did it use in May?
某工厂三月份用水40吨，四月份用水是三月份用水的(3/8)，五月份用水是四月份用水的(1/3)，求五月份用了多少千克水？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">40 * (3/8) * (1/3)</gadget>
<output>5</output>

<result>5</result>