Xiao Ming originally had 25 glass balls. After he gave Xiao Hua 6, he still had one more than Xiao Hua. How many glass balls did Xiao Hua have?
小明原来有25个玻璃球，他送给小华6个后，还比小华多1个，原来小华有多少个玻璃球？
<gadget id="calculator">25 - 6 - 1 - 6</gadget>
<output>12</output>

<result>12</result>