Angela is 4 cm taller than Helen. Helen is 3 cm taller than Amy. If Amy is 150 cm tall, how many centimeters tall is Angela?
Amy's height is 
<gadget id="calculator">150</gadget>
<output>150</output>
150 cm.
Being 3 cm taller than Amy, Helen's height is 150 + 3 = 
<gadget id="calculator">150+3</gadget>
<output>153</output>
153 cm.
Being 4 cm taller than Helen, Angela's height is 153 + 4 = 
<gadget id="calculator">153+4</gadget>
<output>157</output>
157 cm.

<result>157</result>