<human>:  Anne is 2 times as tall as her sister while Bella is 3 times as tall as Anne. If Anne is 80cm tall, what is the height difference between Bella and Anne's sister?
<bot>: How tall is Anne? ** Anne is 2 times as tall as her sister hence 2*(her sister's height) = 80cm
How tall is Anne's sister? ** Her sister's height = 80cm/2 = <<80/2=40>>40cm
How tall is Bella? ** Bella is 3 times as tall as Anne hence Bella's height is 3*80 cm = <<3*80=240>>240 cm
How tall is the height difference between Bella and Anne's sister? ** The height difference between Bella and Anne's sister = 240-40 = <<240-40=200>>200cm
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