 how many equivalent daily inflation rate with time required for prices to double being 3.7 days
CREATE TABLE "table1_13681_2" (
  "country" text,
  "currency_name" text,
  "month_with_highest_inflation_rate" text,
  "highest_monthly_inflation_rate" text,
  "equivalent_daily_inflation_rate" text,
  "time_required_for_prices_to_double" text
);
SELECT COUNT("equivalent_daily_inflation_rate") FROM "table1_13681_2" WHERE "time_required_for_prices_to_double"='3.7 days';