document.write('<p>47+19=66（千克）</p><p>66<span style=\"font-family: Simsun; font-size: 16px; line-height: 35px;\">&divide;（1</span>+2<span style=\"font-family: Simsun; font-size: 16px; line-height: 35px;\">）=22</span>（千克）</p><p>22-19=3（千克）或 47=22<span style=\"font-family: Simsun; font-size: 16px; line-height: 35px;\">&times;2=3</span>（千克）</p>');