During a race transmitted on television, five advertisements were shown, lasting 3 minutes each. One minute of advertising costs $4000. What was the cost of transmitting these advertisements during the race?
During the race, there were five ads, lasting 3 minutes each, so in total, they lasted 5 * 3 = 
<gadget id="calculator">5*3</gadget>
<output>15</output>
15 minutes.
So the total cost of these ads was 15 * 4000 = $
<gadget id="calculator">15*4000</gadget>
<output>60_000</output>
60000.

<result>60_000</result>