Xiaojun has 48 stamps, and the number of Xiaohong's stamps is 20 less than Xiaojun's 4 times. How many stamps does Xiaojun have less than Xiaohong?
小军有48张邮票，小红邮票的张数比小军的4倍少20张．小军比小红少多少张邮票？
<result>172</result>