There were 12 tons of cement on the construction site, 5.8 tons were used in the first week, and 4.6 tons were used in the second week. How much cement is left on the construction site?
工地上原有水泥12吨，第一周用去5.8吨，第二周用去4.6吨．工地上还剩多少水泥？
<gadget id="calculator">12 - 5.8 - 4.6</gadget>
<output>1.6</output>

<result>1.6</result>