To heat during the winter, Ali ordered 850 kilos of coal. The coal is delivered in 50 kg bags, costing $18 per unit. How much does his order cost?
The number of bags Ali ordered is 850 kg/ 50 kg/bag = 
<gadget id="calculator">850/50</gadget>
<output>17</output>
17 bags.
The total order cost is 17 bags x $18/bag = $
<gadget id="calculator">17*18</gadget>
<output>306</output>
306.

<result>306</result>