Billy weighs 9 pounds more than Brad. Brad weighs 5 pounds more than Carl. If Carl weighs 145 pounds, how much does Billy weigh, in pounds?
Brad weighs 145+5=
<gadget id="calculator">145+5</gadget>
<output>150</output>
150 pounds.
Billy weighs 150+9=
<gadget id="calculator">150+9</gadget>
<output>159</output>
159 pounds.

<result>159</result>