Calculations fail if your browser locale uses number formats incompatible with en-US.
E.g. the "How many weekdays in a month?" (near the top of the page) calculation remains blank for me.
Changing the input from "*5" to "4.333333 * 5" makes it work -- the outcome of the previous step is "4,333333" (comma, not dot), breaking the next step...
E.g. the "How many weekdays in a month?" (near the top of the page) calculation remains blank for me.
Changing the input from "*5" to "4.333333 * 5" makes it work -- the outcome of the previous step is "4,333333" (comma, not dot), breaking the next step...