In 10 hectares of wheat fields, the average yield of wheat per hectare is 5.2 tons. If the flour extraction rate is 85%, how many tons of flour can be produced from these wheats?
10公顷小麦田，平均每公顷收小麦5.2吨，如果按85%的出粉率计算，这些小麦可以磨出面粉多少吨？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">5.2 * 10 * (17/20)</gadget>
<output>44.2</output>

<result>44.2</result>