Uncle Zhang raised 210 geese, and the number of geese was as many as that of ducks (3/10). How many ducks do you have?
张大爷养了210只鹅，鹅的只数是鸭的(3/10)．养了多少只鸭？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">210 / (3/10)</gadget>
<output>700</output>

<result>700</result>