The layman asks for help: How big is the finished product of calligraphy mounting four feet long and six feet long? Hehe, it's better to take the meter as the unit.

Calligraphy and painting paper is divided into three feet, four feet, six feet and eight feet. . . There are six feet, eight feet and so on, all referring to the length of the paper. Three feet of paper is about 90 cm long and less than 50 cm wide. There are standards for installing lens cores, namely, tripod lens core 120*60, quadruped lens core 175*83, hexapod lens core 235 *15, and hexapod lens core is estimated to be octapod lens core+015 *. Maybe so. If you don't understand, find a framed book.