In 2003, Experimental Primary School purchased 56 computers and spent 224,000 yuan. Another 45 units were purchased this year at a cost of 157,500 yuan. How much is each computer purchased this year cheaper than before?
2003年，实验小学购买了56台电脑，用了22.4万元．今年又购买了45台，用了15.75万元．今年购买的每台电脑比原来便宜了多少元？
<gadget id="calculator">0.4 - 0.35</gadget>
<output>0.05</output>

<gadget id="calculator">0.05 * 10_000</gadget>
<output>500</output>

<result>500</result>