Manulife Department Store has a kind of fabric that sells for 12.5 yuan per meter. Aunt Zhang bought 4.5 meters of fabric for 100 yuan. How much should I get back?
宏利百货商店有一种布料，每米售价12.5元，张姨用100元买4.5米这样的布料，应找回多少元？
<gadget id="calculator">12.5 * 4.5</gadget>
<output>56.25</output>

<gadget id="calculator">100 - 56.25</gadget>
<output>43.75</output>

<result>43.75</result>