Master Li processed a batch of models. On the first day, he processed all of them (1/5), and on the second day, he processed all of them (4/9). At this time, there are still 32 unprocessed models. How many models will be processed in this batch?
李师傅加工一批模型，第一天加工全部的(1/5)，第二天加工全部的(4/9)，这时还剩下32个没加工，这批模型一共要加工多少个？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/5) + (4/9)</gadget>
<output>29/45 = around 0.644444</output>

<gadget id="calculator">1 - (29/45)</gadget>
<output>16/45 = around 0.355556</output>

<gadget id="calculator">32 / (16/45)</gadget>
<output>90</output>

<result>90</result>