Master Li and Xiao Zhang assemble the same instrument. Master Li assembled 119 units in 7 days, and Xiao Zhang assembled 115 units in 5 days. How many more units does Xiao Zhang assemble than Master Li every day?
李师傅和小张装配同一种仪器．李师傅7天装配119台，小张5天装配115台．小张比李师傅每天多装配多少台？
<gadget id="calculator">115 / 5</gadget>
<output>23</output>

<gadget id="calculator">119 / 7</gadget>
<output>17</output>

<gadget id="calculator">23 - 17</gadget>
<output>6</output>

<result>6</result>