40/()=80/()=()/20=240/()=160/()=560/()=()/8=()/12

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40/()=80/()=()/20=240/()=160/()=560/()=()/8=()/12
40/()=80/()=()/20=240/()=160/()=560/()=()/8=()/12

40/()=80/()=()/20=240/()=160/()=560/()=()/8=()/12
40/(40)=80/(80)=(20)/20=240/(240)=160/(160)=560/(560)=(8)/8=(12)/12

40/(2)=80/(4)=(400)/20=240/(12)=160/(8)=560/(28)=(160)/8=(240)/12