using append() instead of manually appending
using append() instead of manually appending

i-devil/webapps-scientific-calculator,modulexcite/webapps-scientific-calculator,davidmaxwaterman/webapps-scientific-calculator,modulexcite/webapps-scientific-calculator,davidmaxwaterman/webapps-scientific-calculator,01org/webapps-scientific-calculator,01org/webapps-scientific-calculator,i-devil/webapps-scientific-calculator,HageMaster3108/webapps-scientific-calculator