Each group of three digits (separated by commas) has a place holder for Hundreds, Tens, Units.
We have #color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U).#
In case case the groups represent the number of:
#color(orange)("trillions",)color(black)("billions",)color(magenta)("millions",)color(teal)("thousands",)color(sienna)("units",).#
#color(orange)(HTU,)color(black)(HTU,)color(magenta)(HTU,)color(teal)(HTU,)color(sienna)(HTU,).#
#color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U),color(red)(H) color(blue)(T) color(purple)(U).#
#color(white)(000000000000,00)3,2color(white)(.)6color(white)(.)5,8color(white)(.)2color(white)(.)0#
In #3,color(teal)(2)65,820# the first 2 reads as 2 hundred thousand.