Qinghe Village has 21 hectares of cotton fields, accounting for (3/7) of the village's cultivated land area. How many hectares is the area of cultivated land in the village?
清河村有棉田21公顷，占全村耕地面积的(3/7)．全村耕地面积是多少公顷？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">21 / (3/7)</gadget>
<output>49</output>

<result>49</result>