Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_28432 ( "Specimen weight/size" text, "Calculated activity ( Bq )" real, "Calculated activity ( Ci )" text, "Estimated activity GR(api)" text, "Estimated exposure ( mRem )/hr*" text )

### Question ###
If the calculated activity (CI) is 4.96 10 11, what is the specimen weight/size?

### Accurate SQL ###

SELECT "Specimen weight/size" FROM table_28432 WHERE "Calculated activity ( Ci )" = '4.96×10 −11'