Tom cannot afford a normal doctor, so he goes to a discount clinic that is 70% cheaper.   It takes two visits, though, instead of 1.   A normal doctor charges $200 for a visit.   How much money does he save?
Each of Tom's visits was 200*.7=$
<gadget id="calculator">200*.7</gadget>
<output>140</output>
140 cheaper.
So he paid $200 - $140 = $
<gadget id="calculator">200-140</gadget>
<output>60</output>
60 per visit.
That means he paid $60 * 2 = $
<gadget id="calculator">60*2</gadget>
<output>120</output>
120.
So he saved $200 - $120 = $
<gadget id="calculator">200-120</gadget>
<output>80</output>
80.

<result>80</result>