Xiao Ming and Xiao Hua each have some books. After Xiao Ming lent Xiao Hua 10 books, the number of Xiao Hua's books happened to be Xiao Ming's (4/5). If Xiao Ming originally had 180 books, how many books did Xiao Hua originally have?
小明和小华俩人各有一些书，小明借给小华10本书后，小华的本数恰好是小明书的(4/5)．如果小明原来有180本书，小华原来有书有多少本？
<gadget id="calculator">180 - 10</gadget>
<output>170</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">170 * (4/5)</gadget>
<output>136</output>

<gadget id="calculator">136 - 10</gadget>
<output>126</output>

<result>126</result>