The city’s bus system carries 1,200,000 people each day. How many people does the bus system carry for 13 weeks?
13 weeks have 13 * 7 = 
<gadget id="calculator">13*7</gadget>
<output>91</output>
91 days.
For 91 days the bus system carries 1,200,000 * 91 = 
<gadget id="calculator">1200000*91</gadget>
<output>109_200_000</output>
109,200,000 people.

<result>109_200_000</result>