The staff of a precious metal factory mistakenly regarded the precious metal that sold for 0.{_{7}**(•)}{_{3}**(•)} per gram as 0.73 yuan per gram. After he sold b kilograms, the cashier found that the factory lost 146 yuan. Find the value of b.
某贵金属工场职员误把每克售0.{_{7}**(•)}{_{3}**(•)}元的贵金属看成为每克售0.73元．他售出b公斤後，出納員发觉工场损失了146元．求b的值．
<gadget id="calculator">73 / 9_900</gadget>
<output>73/9_900 = around 0.007374</output>

<gadget id="calculator">146 / (73/9_900) / 1_000</gadget>
<output>99/5 = around 19.8</output>

<result>99/5 = around 19.8</result>