20·5·15=1500, 20·4·15=1200
25·4·5=500, 25·12·5=1500
8·125·12=12000, 8·3·12=288
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20·5·15=1500, 20·4·15=1200
25·4·5=500, 25·12·5=1500
8·125·12=12000, 8·3·12=288