Question: how many equivalent daily inflation rate with time required for prices to double being 3.7 days
Schema: create table table_13681_2 (equivalent_daily_inflation_rate varchar, time_required_for_prices_to_double varchar, PRIMARY KEY (equivalent_daily_inflation_rate))
SQL: select count(equivalent_daily_inflation_rate) from table_13681_2 where time_required_for_prices_to_double = "3.7 days"