The garment factory used to make a set of clothes with 4.3 meters of cloth, but now each set saves 0.4 meters. It used to make 780 sets of clothes, how many sets can it make now? (answer in two ways)
服装厂原来做一套衣服用布4.3米，现在每套节省0.4米，原来做780套服装的布，现在可以做多少套？(用两种方法解答)
<gadget id="calculator">312 / 3.9</gadget>
<output>80</output>

<gadget id="calculator">80 + 780</gadget>
<output>860</output>

<result>860</result>