1234*432143214321-4321*123412341234

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1234*432143214321-4321*123412341234

1234*432143214321-4321*123412341234
1234*432143214321-4321*123412341234

1234*432143214321-4321*123412341234
=1234*4321(1*100010001000-1*100010001000)
=0

1234*432143214321-4321*123412341234
=1234*4321*100010001-4321*1234*100010001
=0

1234*432143214321-4321*123412341234
=1234*(4321*100010001)-4321(*1234*100010001)
=0