The store shipped 15 packs of blue sweaters, exactly (3/5) the number of packs of red sweaters shipped. How many packages of red sweaters did the store ship?
商店运来蓝毛衣15包，正好是运来的红毛衣包数的(3/5)．商店运来红毛衣多少包？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 / (3/5)</gadget>
<output>25</output>

<result>25</result>