Bill starts on the 3rd floor. He rides the elevator up to the floor that's equal to 4 times his starting floor plus 6. What floor is Bill on now?
First multiply Bill's starting floor number by 4: 3 * 4 = 
<gadget id="calculator">3*4</gadget>
<output>12</output>
12.
Then add six to find the ending floor Bill is on: 12 + 6 = 
<gadget id="calculator">12+6</gadget>
<output>18</output>
18.

<result>18</result>