There are 3 workers producing chairs in a furniture factory. Each of them produces 4 chairs an hour. As a group, they produce an additional chair every 6 hours. In total, how many chairs have been produced after 6 hours?
The workers produce a combined total of 3 workers * 4 hours = 
<gadget id="calculator">3*4</gadget>
<output>12</output>
12 chairs every hour.
After 6 hours, they have therefore produced 12 * 6 = 
<gadget id="calculator">12*6</gadget>
<output>72</output>
72 chairs.
Adding the additional chair means the total amount of chairs produced is 72 + 1 = 
<gadget id="calculator">72+1</gadget>
<output>73</output>
73 chairs.

<result>73</result>