The steel market originally had 15.2 tons of steel, 3.4 tons were shipped away, and another 1.6 tons were shipped in. How many tons of steel are there in the steel market now?
钢材市场原有钢材15.2吨，运走了3.4吨，又运来了1.6吨，现在钢材市场还有多少吨钢材？
<gadget id="calculator">15.2 - 3.4</gadget>
<output>11.8</output>

<gadget id="calculator">11.8 + 1.6</gadget>
<output>13.4</output>

<result>13.4</result>